There are a number of communities out there to help you deepen your understanding of Knowledge Management.

Recommended online KM communities include:

• actkm (ACT KM Forum)
• sikm (System Integrators KM Leaders)
• km4dev (KM for Development)
• Gurteen Knowledge Community (LinkedIn Group)

Other community lists on the web:

• KM Societies, Associations & Communities
• Global KM Network Directory - David Gurteen

There are also many geographically-based KM communities that focus more heavily on face-to-face meetings and discussions.
Global | Asia | Australia & New Zealand | Europe | North America | South America

Global

• Knowledge Brokers Forum
• KM Global Network - a network of KM Organisations

Asia

Hong Kong

• Hong Kong Knowledge Management Society
• Knowledge Management Development Centre
• 
  

Singapore

• Information & Knowledge Management Society

South Korea

• The Knowledge Management Society of Korea

Thailand

• The Knowledge Management Institute
• The Institute for Knowledge and Innovation - South-East Asia (IKI-SEA)

Japan

• Knowledge Management Society of Japan – KMSJ
  
  

India

• LASSIB Society

Australia & New Zealand

• Australian Society of Knowledge Management (AuSKM) http://www.auskm.org/

Adelaide

• Adelaide KM Group (LinkedIn)
• Gurteen Knowledge Cafe - Adelaide http://www.frysytems.com.au/km

Brisbane

• QKM Forum (LinkedIn)
• Society of Business Communicators QLD http://www.sbcq.com.au/

Canberra

• actKM Forum (LinkedIn)

Melbourne

• Knowledge Management Roundtable Victoria (LinkedIn)
• Melbourne KM Leadership Forum (LinkedIn)
• KM Research Program - Monash http://www.infotech.monash.edu.au/research/groups/km/

New Zealand

• NZ Knowledge Management Network

Perth

• WA Knowledge and Innovation Forum

Sydney

• Knowledge Management Roundtable NSW (LinkedIn)

• NSW KM Forum (LinkedIn)

• Knowledge Liberation Armyhttp://www.mayeticvillage.com/QuickPlace/kla/

• Knowledge Wavz (Standards Australia)http://www.knowledgewavz.typepad.com/

• Society for Organisational Learning Australia http://www.solaustralia.org (now part of IIM)

• SIRF KM Roundtable - NSW http://kmrt.nsw.googlepages.com/home

Europe

France

• Club Gestion des Connaissances (France)

Brussels

• SuperCoP KM - A Community of Practice of Knowledge Managers in Belgium

United Kingdom

• Knowledge & Innovation Network - Warwick University
• 
  

Russia

• KM Russia

North America

• International Institute for Innovation and Knowledge I2KI
• SIKM Leaders
• The Network Roundtable

Toronto, Canada

• Knowledge Workers Toronto (note: there are two connected groups, one called methods the other technology)

South America